کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1492527 992389 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative studies between synthetic routes of SiO2@Au composite nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Comparative studies between synthetic routes of SiO2@Au composite nanoparticles
چکیده انگلیسی

We studied two different methods for the deposition of Au nanoparticles (Au NPs) onto the functionalized silica microspheres. One method was to mix the two kinds of particles together and react at room temperature overnight. The other one was to reduce hydrochloroauric acid to Au NPs with sodium citrate in the presence of the functionalized silica microspheres (one for the naked silica microspheres, the other for the Au-attached silica microspheres). We investigated the morphologies of SiO2@Au composite nanoparticles synthesized by these two methods, and found that the latter achieved a denser Au coverage on silica microspheres. Furthermore, we studied the effect of the pH values in a wide range, respectively, for the two methods. A possible mechanism was put forward to interpret the formation of SiO2@Au composite nanoparticles and the effects of the synthetic routes and pH values on the morphologies and optical properties.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 42, Issue 8, 7 August 2007, Pages 1457–1467
نویسندگان
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